/*      $OpenBSD: ab.c,v 1.1 2014/11/23 08:46:49 guenther Exp $       */

/*
 * Copyright (c) 2014 Philip Guenther <guenther@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>

#define	CALLBACK(file, name)					\
	static void name(void)					\
	{							\
		fprintf(file, "libab "#name"\n");		\
		fflush(file);					\
	}

CALLBACK(stdout, cleanup)

void
ab(void)
{
	atexit(cleanup);
}

static FILE *otherf;

CALLBACK(stdout, atfork_prepare)
CALLBACK(stdout, atfork_parent)
CALLBACK(otherf, atfork_child)

void
ab_atfork(FILE *f)
{
	otherf = f;
	pthread_atfork(atfork_prepare, atfork_parent, atfork_child);
}
